Programmable Electromagnetic Wave Absorption via Tailored Metal Single Atom‐Support Interactions

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 7, 2025

Abstract Metal single atoms (SA)‐support interactions inherently exhibit significant electrochemical activity, demonstrating potential in energy catalysis. However, leveraging these to modulate electronic properties and extend application fields is a formidable challenge, demanding in‐depth understanding quantitative control of atomic‐scale interactions. Herein, situ, off‐axis electron holography technique utilized directly visualize the between SAs graphene surface. These facilitate formation dispersed nanoscale regions with high charge density are highly sensitive external electromagnetic (EM) fields, resulting controllable dynamic relaxation processes for accumulation restoration. This leads customized dielectric relaxation, which difficult achieve current band engineering methods. Moreover, behaviors insensitive elevated temperatures, having characteristics distinct from those typical metallic or semiconducting materials. Based on results, programmable EM wave absorption achieved by developing library SA‐graphene materials precisely controlling SA‐support tailor their responses waves terms frequency intensity. advancement addresses anti‐EM interference requirements components, greatly enhancing development integrated circuits micro‐nano chips. Future efforts will concentrate manipulating atomic SA‐support, potentially revolutionizing nanoelectronics optoelectronics.

Language: Английский

---

Metal‐Based Oxygen Reduction Electrocatalysts for Efficient Hydrogen Peroxide Production

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 24, 2024

Abstract Hydrogen peroxide (H 2 O ) is a high‐value chemical widely used in electronics, textiles, paper bleaching, medical disinfection, and wastewater treatment. Traditional production methods, such as the anthraquinone oxidation process direct synthesis, require high energy consumption, involve risks from toxic substances explosions. Researchers are now exploring photochemical, electrochemical, photoelectrochemical synthesis methods to reduce use pollution. This review focuses on 2‐electron oxygen reduction reaction (2e − ORR) for electrochemical of H 2, discusses how catalyst active sites influence adsorption. Strategies enhance selectivity by regulating these presented. Catalysts strong adsorption initiate reactions weak *OOH promote formation. The also covers advances single‐atom catalysts (SACs), multi‐metal‐based catalysts, highlights non‐noble metal oxides, especially perovskite their versatile structures potential 2e ORR. localized surface plasmon resonance (LSPR) effects performance discussed. In conclusion, emphasis placed optimizing through theoretical experimental achieve efficient selective production, aiming sustainable commercial applications.

Language: Английский

---

Tuning the Formation Kinetics of *OOH Intermediate with Hollow Bowl-Like Carbon by Pulsed Electroreduction for Enhanced H₂O₂ Production

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: March 28, 2025

The electrochemical synthesis of hydrogen peroxide (H2O2) via the two-electron oxygen reduction reaction (2e- ORR) is a promising alternative to conventional anthraquinone method. However, due local alkalinization near catalyst surface, restricted replenishment and insufficient activated water molecule supply limit formation key *OOH intermediate. Herein, pulsed electrocatalysis approach based on structurally optimized S/N/O tridoped hollow carbon bowl has been proposed overcome this challenge. In an H-type electrolytic cell, method achieves superior H2O2 yield rate 55.6 mg h-1 mgcat.-1, approximately 1.6 times higher than potentiostatic (34.2 mgcat.-1), while maintaining Faradaic efficiency above 94.6%. situ characterizations, finite element simulations, density functional theory analyses unveil that application potentials mitigates OH- concentration, enhances activation proton generation, facilitates production within bowl-like structure. These effects synergistically accelerate kinetics intermediate by efficient generation *O2 *H2O intermediates, leading yields. This work develops strategy tune catalytic environments for diverse applications.

Language: Английский

---

Assessment of role of glucose oxidase, flavonoids, copper and iron on the generation of hydrogen peroxide in honey

Food Research International, Journal Year: 2025, Volume and Issue: 202, P. 115532 - 115532

Published: Jan. 7, 2025

Language: Английский

---

Recent Advances in Electrochemical H2O2 Production Via Oxygen Reduction Reaction: Fundamentals and Catalyst Design

Highlights in Science Engineering and Technology, Journal Year: 2025, Volume and Issue: 125, P. 416 - 427

Published: Feb. 18, 2025

The electrochemical synthesis of hydrogen peroxide (H2O2) through the two-electron oxygen reduction reaction (2e− ORR) presents a promising alternative to conventional anthraquinone oxidation method. successful commercialization H2O2 production depends critically on fabrication efficient cathode catalysts that exhibit high catalytic activity, selectivity, and stability. However, achieving significant yields with advanced electrocatalysts remains challenging. This paper systematic review latest advancements in design, synthesis, application for production, focus noble metals, transition carbon-based systems. In addition, strategies enhancing electrocatalytic activity selectivity are also discussed, aiming at developing cost-effective, high-performance 2e− ORR. Finally, we summarize critical challenges this field, providing comprehensive reference guide future research development efforts improving technologies. By addressing these encouraging innovative approaches, may advance toward more sustainable industrial applications.

Language: Английский

---

Achievements and Challenges in Carbon‐Free Dual‐Atom Catalysts for Electrocatalysis

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 25, 2025

Abstract Carbon‐free dual‐atom catalysts (CFDACs) are beginning to make their presence in the field of electrocatalysis due unique properties and structures that different from those carbon‐based DACs, which endowed with activity, selectivity, stability. Currently, some advances made study CFDACs, including structure‐performance relationships metal‐support interaction, theoretical combined experiments, electrocatalytic applications potential catalytic mechanisms, design strategies achieve highly active performance. Herein, perception CFDACs is first elaborated terms carbon‐free substrates sites, then briefly summarizes advanced characterization techniques, study, energy storage conversion applications, highlights realize high‐performance vacancy anchoring, strain regulation, alloying, finally put forward personal viewpoints on current challenges future development CFDACs.

Language: Английский

---

NH₄Cl‐Assisted Electrosynthesis of P‐Doped Co(OH)₂ Nanosheet on Cu₂S Hollow Nanotube Arrays for Glycerol Electrooxidation

Small Methods, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 10, 2024

The glycerol oxidation reaction (GOR) for producing high-value-added organic compounds is of great research interest due to its potential in alleviating the energy crisis. Herein, a facile NH

Language: Английский

---